One pump was returned for evaluation.Visual inspection found the device in fair condition with evidence of fluid exposure on all pump surfaces.It was observed that there was corrosion in the battery department.It was suspected that the corrosion was due to patient medication.A review of the event log found no errors.Functional testing involved simulated use testing, delivery accuracy testing, and sensor testing found no discrepancies.Based on the evidence, the root cause was attributed to fluid ingression due to a user issue.
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